const cp  = require('child_process');
const {resolve} = require('path');
;(async()=>{
    const script = resolve(__dirname,'../crawler/trailer-list.js')
    const child =  cp.fork(script,[])
    let invoked = false;
    child.on('error',err=>{
        if(invoked) return;
        invoked = true;
        console.log(err)
    })
    child.on('exit',code=>{
        if(invoked) return;
        invoked = true;
        let err = code ===0 ?null:new Error('exit code'+ code);
        console.log(err)
    })
    child.on('message',data=>{
        let result = data.result;
        console.log(result)
    })
})();